EP 2100571 A1 20090916 - A longitudinally ground file having increased resistance to torsional and cyclic fatigue failure
Title (en)
A longitudinally ground file having increased resistance to torsional and cyclic fatigue failure
Title (de)
Längsbodenfeile mit erhöhter Festigkeit gegen Torsion und zyklischen Ermüdungsfehlern
Title (fr)
Lime rectifiée longitudinalement dotée d'une meilleure résistance à la défaillance due à la fatigue torsionnelle et cyclique
Publication
Application
Priority
US 4736908 A 20080313
Abstract (en)
A method of producing an endodontic file that involves grinding in a plane substantially parallel to the longitudinal axis of a rotating dental instrument blank. By grinding the dental instrument blank in this manner, the torsional strength of the resulting endodontic file is not eroded during its production, thereby providing a file that is less susceptible to breakage during its use.
IPC 8 full level
A61C 5/02 (2006.01); B24B 19/02 (2006.01)
CPC (source: EP US)
A61C 5/42 (2017.01 - EP US); B24B 1/00 (2013.01 - EP US); B24B 19/022 (2013.01 - EP US); Y10T 29/49 (2015.01 - EP US); Y10T 29/49567 (2015.01 - EP US); Y10T 29/49568 (2015.01 - EP US)
Citation (search report)
- [X] US 5655950 A 19970812 - HEATH DEREK E [US], et al
- [X] US 5464362 A 19951107 - HEATH DEREK E [US], et al
- [A] US 5984679 A 19991116 - FARZIN-NIA FARROKH [US], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2100571 A1 20090916; JP 2009273876 A 20091126; JP 5368835 B2 20131218; US 2009229129 A1 20090917; US 2013263700 A1 20131010; US 8413330 B2 20130409; US 8789444 B2 20140729
DOCDB simple family (application)
EP 09250717 A 20090313; JP 2009059713 A 20090312; US 201313858526 A 20130408; US 4736908 A 20080313